.rounded {
    -fx-border-color: dodgerblue;
    -fx-border-width: 2px;
    -fx-border-radius: 15px;
    -fx-padding: 0px;
}
#hiddenSplitter {
    -fx-background-color: null;
    -fx-padding: 10px;
}
#hiddenSplitter *.split-pane-divider,
        #hiddenSplitter *.vertical-grabber,
        #hiddenSplitter *.horizontal-grabber {
    -fx-background-color: null;
    -fx-border-color: null;
    -fx-padding: 5px;
}
#hiddenFrame {
    -fx-background-color: null;
    -fx-border-color: #6666663f;
    -fx-border-width: 2px;
    -fx-border-radius: 2px;
}
#hiddenFrame *.split-pane-divider,
        #hiddenSplitter *.vertical-grabber,
        #hiddenSplitter *.horizontal-grabber {
    -fx-background-color: null;
}